Police say they arrested an armed teenager in Kalamazoo last night.  Officers say they got a report about the 15-year-old walking around with a concealed pistol at around 9:45.  Police say the teen ran when officers tried to talk to him, but he was caught after he ran into a nearby home.  The suspect was taken to the County Juvenile Home on suspicion of Carrying a Concealed Weapon, Resisting and Obstructing and Illegal Entry.